package com.example.test.andlang.log;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;

import com.example.test.andlang.R;
import com.example.test.andlang.andlangutil.BaseLangApplication;
import com.example.test.andlang.util.BaseLangUtil;
import com.example.test.andlang.util.LogUtil;
import com.example.test.andlang.util.ToastUtil;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class AppCrashHandler implements UncaughtExceptionHandler {
    public static final String TAG = "AppCrashHandler";


    //系统默认的UncaughtException处理类
    private UncaughtExceptionHandler mDefaultHandler;
    //CrashHandler实例  
    private static AppCrashHandler INSTANCE;
    //程序的Context对象  
    private Context mContext;
    //用来存储设备信息和异常信息  
    private Map<String, String> infos = new HashMap<String, String>();

    //用于格式化日期,作为日志文件名的一部分  
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    /**
     * 保证只有一个CrashHandler实例
     */
    private AppCrashHandler() {
    }

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public static AppCrashHandler getInstance() {
        if (INSTANCE == null) {
            INSTANCE = new AppCrashHandler();
        }
        return INSTANCE;
    }

    /**
     * 初始化
     *
     * @param context
     */
    public void init(Context context) {
        mContext = context.getApplicationContext();
        //获取系统默认的UncaughtException处理器  
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        //设置该CrashHandler为程序的默认处理器  
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 当UncaughtException发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            //如果用户没有处理则让系统默认的异常处理器来处理  
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                AppLog.e(e);
//                MyLogger.getInstance().e("error : "+e);
            }
            //退出程序  
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);
        }
    }

    /**
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
     *
     * @param ex
     * @return true:如果处理了该异常信息;否则返回false.
     */
    private boolean handleException(Throwable ex) {

        if (ex == null) {
            return false;
        }

        //使用Toast来显示异常信息  
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                handler.sendEmptyMessage(0);
                Looper.loop();
            }
        }.start();
        //收集设备参数信息   
        collectDeviceInfo(mContext);
        //保存日志文件   
        saveCrashInfo2File(ex);
        return true;
    }

    /**
     * 收集设备参数信息
     *
     * @param ctx
     */
    public void collectDeviceInfo(Context ctx) {
        try {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (NameNotFoundException e) {
            AppLog.e("an error occured when collect package info");
        }
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                AppLog.d(field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                AppLog.e("an error occured when collect crash info:" + e);
            }
        }
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return 返回文件名称, 便于将文件传送到服务器
     */
    private String saveCrashInfo2File(Throwable ex) {

        StringBuffer sb = new StringBuffer();
        for (Map.Entry<String, String> entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "\n");
        }

        if(!LogUtil.isLog) {
            //不开启日志时  日志不存本地
            //友盟错误上传
//            if(ex!=null) {
//                MobclickAgent.reportError(mContext, ex);
//            }
            return "";
        }
        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        String result = writer.toString();
        sb.append(result);
        AppLog.e(sb.toString());
        try {
            long timestamp = System.currentTimeMillis();
            String time = formatter.format(new Date());
            String fileName = "crash-" + time + "-" + timestamp + ".log";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = BaseLangApplication.logDir;
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            AppLog.e("an error occured while writing file:" + e);
        }
        return null;
    }

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            ToastUtil.show(mContext,R.string.tip_log_exit);
        }
    };

    public void saveReqInfo2File(Throwable ex,String msg){
        try {
            StringBuffer sb = new StringBuffer();
            if(!BaseLangUtil.isEmpty(msg)){
                sb.append(msg+"\n");
            }
            if(!LogUtil.isLog) {//不开启日志时  日志不存本地
                return;
            }
            if(ex!=null) {
                Writer writer = new StringWriter();
                PrintWriter printWriter = new PrintWriter(writer);
                ex.printStackTrace(printWriter);
                Throwable cause = ex.getCause();
                while (cause != null) {
                    cause.printStackTrace(printWriter);
                    cause = cause.getCause();
                }
                printWriter.close();
                String result = writer.toString();
                sb.append(result);
            }

            AppLog.e(sb.toString());

            long timestamp = System.currentTimeMillis();
            String time = formatter.format(new Date());
            String fileName = "crash-" + time + "-" + timestamp + ".log";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = BaseLangApplication.logDir;
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                fos.close();
            }
        } catch (Exception e) {
            AppLog.e("an error occured while writing file:" + e);
        }
    }

    public void saveLogInfo2File(String msg){
        try {
            if(!LogUtil.isLog) {//不开启日志时  日志不存本地
                return;
            }

            if(BaseLangUtil.isEmpty(msg)){
                return;
            }

            //日志打印
            LogUtil.d(msg);

            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = BaseLangApplication.logDir;
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                AppLog.writeLogtoFile("d", "0.0", msg);
            }
        } catch (Exception e) {
            AppLog.e("an error occured while writing file:" + e);
        }
    }
}
